Assigwoe



0. LAURENZ.

MILLING CUTTERI APPLICATION FILED Amzz. 191B.

. Patented Oct. 28,1919.

each is vand each OTTO LAURENZ, OF CHICAGO, ILLINOIS, .ASSIG'NOR TO WESTERN EI'JECTRISJI COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

MILLING-CUTTER.

Specification of Letters Patent.

Application led April 22, 1918. Serial No. 230,194. n

Toa/.ZZ whom t may concern: Be it known that I, OTTO LAURENZ, a citizen of the United States, residing at Chi-.

of Cook and State of have invented certain new and use- Milling- Cutters, of a full, clear, concise,

cago, in thecounty Illinois, ful Improvements in' which the followingis and exact description.

This invention relates to milling cutters, and more particularly to a side tooth milling cutter for cutting The object of this invention in general is to provide a milling cutter which is 'capable Vof operating upon stock moving at a high speed, to cut a clean, deep slot, without chattering or vibrating.

In accordance with one feature of this invention, a milling cutter is provided in which the teeth are located'in 4a staggered angle relation lwith respect to each other, tooth is provided with a cutting edge 'upon one side only. Adjacent teeth are staggered in opposite directions and provided with afeutting edge upon its advancing side, the opposite side being provided with a cleaning edge.

In accordance with another' feature of this invention the teeth of the cutter are so constructed that the action thereof upon the,4 stock is wholly a shearing one free from a f scraping or dragging effect. This isprovided for by sloping the front face of each tooth backwardly from the cutting edge.

In the drawings- Figure 1 is a view in side elevation of a milling cutter embodying the features of this invention;

Fig. Qfis' a view looking toward the peripheraledge of the device;

Fig. -3 is a detailed sectional view taken upon the line 3 3 of Fig. 1, and

Fig. 4 is a detailed sectional upon the line 4 4 of Fig. 1.

As shownlin the drawings, 4 designates a cylindrical body` portion of a milling cutter provided with a centrally located opening 5, by means of which it may be secured to a mandrel. The reference numerals 6 and 7 view taken designate the cutting teeth of the device. As l.

slots inv metal bodies.

. an active cutting tion is capable the tooth Patented Oct. 28, 1919.1

cated by the arrow, with a cutting edge S I and upon its opposite side with a edge 9. Likewise each tooth 7 is provided ilpon its advancing side -with a cutting edge l0 and upon its opposite sidejwith a cleaning edge 11. Each tooth 6 is adjacent to a tooth 7 so that the cutting operation upon one side of the slot will be performed by the tooth 6 while that upon the other side of the slot will be performed by the tooth 7 The several teeth which operate upon the same side of the slot are sufciently close together to insure a deep and clean cut, while the cleaning 7 clearance between adjacent teeth, due to the staggered angle relation between them, is sufficient to ing from the cut to be readily carried away withoutclogging the action of the succeed- .ing teeth or requiring any scraping action to'remove the loose metal other than that performed by tion.

The cleaning edges 9 and 11 are cut away sufficiently to provide a slight clearance between these edges andthe side wall ofthe slot which is being cut. This isillustrated in Figs. 3 and 4, in which the reference characters 14 and 15 designate the clearance spaces upon opposite sidesf of the cut.

Tle front surface of each tooth is prefthe teeth in the cutting operaerably cut at an angle of about 10 to 15 defront face of each tooth insures that its'acpermit the metal chips result-f tion upon the metal will be wholly a shearin one free from scraping or'drag 'ng'.

Vith a cutter of this type'each txgibth is tooth,and due to the staggered angle relation between adjacent teeth, the clearance space provided thereby, and the shearing action of each tooth dusY to its sloping front face, a cutter of-this descripof cutting a deep, clean slot or groove through hard metal stock which is being fed to it at a high rate of speed.

What is claimed is :f

1. A milling cutter comprising a cylindrical body portion provided on its peripheral edgel with a plurality of teeth, ad- 'jacent ones of which are inclined or staggered in opposite directions and each tooth of which is vprovided with a cutting edge on one side only, the cutting edges of adjacent teeth being at opposite sides of the cutter.

2.` A milling cutter comprising a cylindrical body portion provided on its peripheral edge with a p urality of teeth, adjacent ones of which are sta gered '1n opposite directions, each tooth eing provided at one side only with a cutting edge and at its other side with a cleaning edge, the cutting edges of adjacent teeth being upon opposte sldes of the cutter. l

3. A milling cutter comprising a cylindrical body portion provided upon its peripheral edge with a plurality of cutting the cutter and the cleaning edges of the teeth beingcut down beyond the line-ofV posite directions, eachy travel of the cutting edge of the adjacent S teeth to provide a clearance between the vcleaning edge and the side Wall of the surface cut.

In Witness whereof, I hereunto subscribe my name thiseighth day of April A. D.,

.oT'ro LAURENZ 

